<template>
  <el-card class="box-card">
    <div slot="header" class="clearfix">
      <span>更换头像</span>
    </div>
    <div>
      <!-- 图片，用来展示用户选择的头像 -->
      <img v-if='avatar' :src="avatar" alt="" class="preview" />
      <img v-else src="../../../assets/images/avatar.jpg" alt="" class="preview" />
     <input type="file" accept="images/*" hidden ref="tuxiang" @change="huan">
      <!-- 按钮区域 -->
      <div class="btn-box">
        <el-button type="primary" icon="el-icon-plus" @click="an">选择图片</el-button>
        <el-button type="success" icon="el-icon-upload" :disabled="!avatar" @click="chuan" >上传头像</el-button>
      </div>
    </div>
  </el-card>
</template>

<script>
export default {
  name: 'UserAvatar',
   data(){
     return{
     avatar:''
     }
   },
  methods:{
    an(){
      this.$refs.tuxiang.click()
    },
    huan(e){
    const files = e.target.files
    if(files.length === 0){
      this.avatar = ''
    }else{
      const fr = new FileReader()
      fr.readAsDataURL(files[0])
      fr.onload =()=>{
        this.avatar = fr.result
      }
    }
    },
  async chuan(){
    const {data:res} = await this.$http.patch('/my/update/avatar',{avatar:this.avatar})

    if(res.code !== 0) return this.$message.error(res.message)
    this.$message.success(res.message)
    this.$store.dispatch('fason')
    }
  }
}
</script>

<style lang="less" scoped>
.btn-box {
  margin-top: 10px;
}
.preview {
  object-fit: cover;
  width: 350px;
  height: 350px;
}
</style>